Great switch, poor power supply
Hopefully TP-Link with find a better supplier for their power supplies soon. I like the switch, but until I know for certain I won't be getting any more whining adapters I won't be getting any more of these switches.
As a switch this works very well; It has no issues maintaining gigabit transfer speeds between two devices; I have used this switch for almost a year and have had no issues with maintaining connectivity.
Unfortunately the power supply included with this unit exhibits some of the most irritating coil whine I have come across; Mine would produce an annoying high pitched whine as soon as it was plugged it.